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Abstract: "Their excellent fossil record and widespread distribution sees planktonic graptolites as one of the most important taxa in the history of geology. They have played a major role in the establishment of the stratigraphic divisions of the Early Palaeozoic, and their rapid evolution provides a high resolution timescale for this interval which is still used at the present day. Though they often only remain as faint impressions on the rock - Linnaeus coined the term graptolite for ‘things that resemble fossils, but are not fossils themselves’ - well-preserved graptolites contain a wealth of information pertaining to both their biological affinity and behaviour. Despite the long history of graptolite research and the increasing number of well-preserved graptolites, their fundamental palaeobiology has received little attention."
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